CVE-2016-6255

Publication date 7 March 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Portable UPnP SDK (aka libupnp) before 1.6.21 allows remote attackers to write to arbitrary files in the webroot via a POST request without a registered handler.

From the Ubuntu Security Team

Matthew Garrett discovered that libupnp mishandled POST requests by default. An attacker could use this vulnerability to write files to arbitrary locations in the victim's filesystem, possibly as root.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libupnp	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Ignored end of life
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 1:1.6.19+git20160116-1ubuntu0.1~esm1
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 1:1.6.17-1.2+deb7u1build0.14.04.1
	12.04 LTS precise	Ignored end of life

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Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-4794-1
libupnp vulnerabilities
15 March 2021